BZT52C11-7-F
11V zener diode, Q1 gate-source clamp — Diodes Incorporated — C92321 — board-a D8 — rec-bzt52c11-c92321
Everything below is projected from this project's stored component evidence. Values keep the exact wording, conditions, units and verdicts they were recorded with — nothing here is re-typed, corrected, or combined into an overall judgement about the part.
This record in the catalog: BZT52C11-7-F
Identity
Record ID:
rec-bzt52c11-c92321Record kind: standalone
Manufacturer part number:
BZT52C11-7-FManufacturer: Diodes Incorporated
Function: 11V zener diode, Q1 gate-source clamp
Orderable ID:
C92321Package:
SOD-123_L2.8-W1.8-LS3.7-RDInventory line:
line-c92321Also known as:
zener diode,gate clampFit: Fitted
Identity state: VERIFIED
Source state: AVAILABLE
Coverage: 1 open of 3 published
Placements
Every position this exact line occupies in the as-built design. One line may be placed many times and across more than one board.
| Board | Reference designator | Fit |
|---|---|---|
| board-a | D8 | Fitted |
Coverage
Coverage is stated one domain at a time and is never rolled up. A domain marked open is a question that has not been answered; it is not a finding that the part is unsuitable. A record with no open domains has not thereby been declared safe.
electrical-limits
Coverage ID:
cov-bzt52c11-electrical-limitsStatus: COVERED
Reason: Zener window (10.4-11.6 V at 5 mA, exactly the dec-e locked window), minimum knee (10.4 V), leakage (0.1 uA at 8.0 V), impedance (ZZT 20 Ohm at 5 mA), and power dissipation (500 mW at TL=+75 C) are primary-source confirmed from the exact BZT52C11 row of DS18004 Rev. 38-2.
Facts in this domain:
distributor-identity
Coverage ID:
cov-bzt52c11-distributor-identityStatus: COVERED
Reason: Exact orderable C92321 is bound to Diodes Incorporated BZT52C11-7-F by the dated LCSC product page identity extract (2,540 units in stock at the 2026-08-14 retrieval).
Facts in this domain:
gate-clamp-application
Coverage ID:
cov-bzt52c11-gate-clamp-applicationStatus: OPEN
Reason: dec-e-q1-20v-gate-guard NEEDS BENCH residuals: sub-knee conduction/leakage at the 9.62 V operating point (0.78 V below the 10.4 V minimum knee, with no leakage guarantee above VR 8.0 V) and Q1 gate soft-start behavior with the added junction capacitance; both wait on the Board A bring-up bench.
Facts in this domain:
Blocked by: these facts must be resolved before the domain can close. Each is listed in full under Facts.
Facts
Each fact keeps its value, its unit, the conditions it holds under, where it came from and how far it has been confirmed as separate fields, because they are separate claims. A value without its conditions is not the same fact, and a verdict is about the evidence for the value, not about the part.
GUARANTEED_ELECTRICAL
A parameter the manufacturer guarantees over the stated conditions, usually with minimum, typical and maximum values.
| Fact | Value | Unit | Conditions | Verdict | Provenance | Evidence |
|---|---|---|---|---|---|---|
fact-bzt52c11-vz-min | 10.4 | V | minimum zener (knee) voltage VZ at IZT 5 mA, TA=+25 C; the deterministic lower bound of the clamp window | PASS - primary-source confirmed | PRIMARY-SPEC | src-bzt52c11-diodes-primary: page 2 electrical characteristics table, BZT52C11 row, VZ min column |
fact-bzt52c11-ir-leakage | 0.1 | uA | maximum reverse leakage IR at VR 8.0 V, TA=+25 C; the datasheet guarantees leakage only at 8.0 V, below the 9.62 V divider operating point, so sub-knee leakage at the operating point is not primary-bounded | PASS - primary-source confirmed | PRIMARY-SPEC | src-bzt52c11-diodes-primary: page 2 electrical characteristics table, BZT52C11 row, IR and VR columns |
fact-bzt52c11-zzt | 20 | Ohm | maximum zener impedance ZZT at IZT 5 mA, f=1 kHz; ZZK 150 Ohm at IZK 1.0 mA in the same row | PASS - primary-source confirmed | PRIMARY-SPEC | src-bzt52c11-diodes-primary: page 2 electrical characteristics table, BZT52C11 row, ZZT and ZZK columns |
THERMAL_SOA
Thermal and safe-operating-area behaviour: how much the part may dissipate, and under what mounting and ambient conditions.
| Fact | Value | Unit | Conditions | Verdict | Provenance | Evidence |
|---|---|---|---|---|---|---|
fact-bzt52c11-pd | 500 | mW | power dissipation PD at TL=+75 C (Note 7); 370 mW at TA=+25 C on FR-4 (Note 8); orders of magnitude above the R12-limited clamp dissipation (~4.2 mW worst case at the 32.4 V clamp table point) | PASS - primary-source confirmed | PRIMARY-SPEC | src-bzt52c11-diodes-primary: page 2 thermal characteristics table, PD rows |
PROTECTION_BREAKDOWN
The voltage at which a protection device begins to conduct.
| Fact | Value | Unit | Conditions | Verdict | Provenance | Evidence |
|---|---|---|---|---|---|---|
fact-bzt52c11-vz-window | 10.4 to 11.6 | V | zener voltage VZ minimum/maximum at IZT 5 mA, TA=+25 C, exact BZT52C11 row (11 V nominal, marking code WG); equals the dec-e-q1-20v-gate-guard locked window 10.4-11.6 V exactly | PASS - primary-source confirmed | PRIMARY-SPEC | src- |
PROJECT_STATE
A value this project recorded about how the part is used here — a chosen operating point, a net assignment, or a derived figure. Not a manufacturer specification.
| Fact | Value | Unit | Conditions | Verdict | Provenance | Evidence |
|---|---|---|---|---|---|---|
fact-bzt52c11-manufacturer | Diodes Incorporated | NONE | exact orderable identity; document served from the manufacturer domain diodes.com | PASS - primary-source confirmed | PRIMARY-SPEC | src-bzt52c11-diodes-primary: page 1 title block (BZT52C2V0 - BZT52C51, Document number DS18004, (c) Diodes Incorporated) and manufacturer-domain hosting; page 2 exact BZT52C11 row |
fact-bzt52c11-identity | lcsc=C92321; manufacturer=Diodes Incorporated; mpn=BZT52C11-7-F; variant=unidirectional 11 V zener, SOD-123 (SOD123) tape/reel, commercial grade -7-F; LCSC listing stock 2,540 units at 2026-08-14 retrieval | NONE | stable distributor identity binding of the exact orderable; same-name cross-vendor substitution prohibited (a BZT52C11 from any other vendor is a different part); supplies no electrical or thermal authority. Stock figure inside the variant string is a dated observation. | CONFIRMED - distributor identity only | DISTRIBUTOR-IDENTITY | src-bzt52c11-lcsc-identity: product page title row and stock row, retrieved 2026-08-14 |
fact-bzt52c11-polarity | cathode band | NONE | manufacturer marking rule for the SOD123 package; project pad mapping is recorded in the owner pin map (pin/pad 1 = cathode) | PASS - primary-source confirmed | PRIMARY-SPEC | src-bzt52c11-diodes-primary: page 1 mechanical data, polarity statement row |
fact-bzt52c11-knee-margin-15v | 0.78 V margin between the 9.62 V gate-divider operating point at the 15 V contract and the 10.4 V minimum knee; sub-knee conduction at 15 V is a bench check | NONE | dec-e-q1-20v-gate-guard NEEDS BENCH residual: |Vgs| = 15 x 100k/(100k+56k) = 9.62 V at the legal 15 V contract sits 0.78 V below the 10.4 V minimum knee (fact-bzt52c11-vz-min); the datasheet leakage guarantee stops at VR 8.0 V (fact-bzt52c11-ir-leakage), so conduction/leakage at the operating point must be measured on the bench — if it conducts, step the window to a 12 V-nominal part | NEEDS BENCH | PROJECT-CHOICE | src- |
fact-bzt52c11-d8-orientation | D8 cathode (pin 1) on VBUS_IN (Q1 source), anode (pin 2) on Net-(Q1-G), reverse-biased by |Vgs| in normal operation | NONE | dec-e-q1-20v-gate-guard placement, locked by scripts/schgen/board_a_spec.py (D8 in NETS: VBUS_IN += D8.1, Net-(Q1-G) += D8.2) and the generated board-a schematic; Eeschema ERC/visual review and gate soft-start behavior with the added junction capacitance remain open bench items | NEEDS BENCH | PROJECT-CHOICE | src-bzt52c11-diodes-primary: page 1 mechanical data polarity row (cathode band) versus the generator-spec pin lock; bench soft-start/turn-on measurement pending |
Pin maps
The mapping between the schematic symbol's pins and the footprint's pads, as recorded. A record may carry more than one map when the same part is documented in more than one context.
pinmap-bzt52c11-c92321
Symbol:
BZT52C11-7-F_C92321Footprint:
SOD-123_L2.8-W1.8-LS3.7-RDPins: 2
Pin assignments
| Symbol pin | Name | Footprint pad | Function |
|---|---|---|---|
1 | K | 1 | cathode (band end); board-a D8: VBUS_IN = Q1 source |
2 | A | 2 | anode; board-a D8: Net-(Q1-G) = Q1 gate |
Interactions
Behaviour that is not a property of this part alone. Each interaction names the records it spans, the conditions it holds under, and how far it has been confirmed. An interaction that spans several parts appears on every one of their pages, under the same identifier, because it is equally a fact about each.
int-bzt52c11-gate-clamp
Records involved:
rec-bzt52c11-c92321(this record)Conditions: D8 across the Q1 gate-source (cathode on VBUS_IN, anode on Net-(Q1-G)) bounds |Vgs| to the 10.4-11.6 V window in every reachable state that would otherwise exceed the AO3401A +/-12 V Vgs abs-max (unprogrammed 20 V PDO3 attach: -12.82 V unclamped; D5 clamp event with VBEN asserted: -20.77 V unclamped), with clamp current R12-limited to ~161 uA at 20 V and ~382 uA at 32.4 V per dec-e-q1-20v-gate-guard; sub-knee behavior at the 15 V operating point and gate soft-start with the added junction capacitance are the recorded bench residuals
Verdict: NEEDS BENCH
Facts this rests on:
Cross-component rules
Rules that span several parts at once and are published in full on the integration page. Each rule's verdict below is that rule's own — it is a statement about the cross-component question, not about this part — and the exact wording of what the rule refuses to conclude is published with the rule itself.
No cross-component rule names this record.
Sources
Every document cited above, with its identification, when it was retrieved, and what kind of authority it carries. Sources that could not be retrieved are listed too, with their unavailability stated, so a gap in the evidence is visible rather than absent.
Diodes Incorporated BZT52C2V0 - BZT52C51 surface mount zener diode
Source ID:
src-bzt52c11-diodes-primaryDocument number: DS18004 Rev. 38 - 2
Revision: Rev. 38 - 2
Document date: 2017-10-01
Retrieved: 2026-08-14
Authority: MANUFACTURER_PRIMARY
Locator: Page 2 electrical characteristics table, exact BZT52C11 row (marking code WG) and thermal characteristics table; page 1 mechanical data (Case: SOD123, Polarity: Cathode Band) and ordering information table, (Type Number)-7-F row
Printed page: 2
Availability: AVAILABLE
Document URL: https:
/ / www. diodes. com/ assets/ Datasheets/ ds18004. pdf
LCSC product page C92321 — BZT52C11-7-F | Zener Diodes | Diodes Incorporated | LCSC
Source ID:
src-bzt52c11-lcsc-identityDocument number: C92321
Revision: volatile web page (as retrieved)
Document date: 2026-08-14
Retrieved: 2026-08-14
Authority: DISTRIBUTOR_IDENTITY
Locator: Product page title row 'BZT52C11-7-F' (Diodes Incorporated, Zener Diodes category, SOD-123 package) and the stock row (2,540 in stock, 20-piece minimum), retrieved 2026-08-14
Printed page: 1
Availability: AVAILABLE
Document URL: https:
/ / www. lcsc. com/ product- detail/ C92321. html
Legend
What the recorded terms on this page mean, in ordinary words. The exact terms above are the ones that count; these descriptions explain them and never replace them.
Verdict
| Recorded term | What it means |
|---|---|
CONFIRMED - distributor identity only | A distributor listing confirms which part this is, and nothing more. It carries no electrical, thermal or lifetime authority. |
NEEDS BENCH | Cannot be settled from documents. It needs measurement on real hardware before it can be relied on. |
PASS - primary-source confirmed | Confirmed against the manufacturer's own document for this exact part. |
Provenance
| Recorded term | What it means |
|---|---|
DISTRIBUTOR-IDENTITY | Taken from a distributor listing. Identity information only. |
PRIMARY-SPEC | Taken from the manufacturer's own specification document. |
PROJECT-CHOICE | A decision made by this project. No vendor asserts it. |
Fact class
| Recorded term | What it means |
|---|---|
GUARANTEED_ELECTRICAL | A parameter the manufacturer guarantees over the stated conditions, usually with minimum, typical and maximum values. |
PROJECT_STATE | A value this project recorded about how the part is used here — a chosen operating point, a net assignment, or a derived figure. Not a manufacturer specification. |
PROTECTION_BREAKDOWN | The voltage at which a protection device begins to conduct. |
THERMAL_SOA | Thermal and safe-operating-area behaviour: how much the part may dissipate, and under what mounting and ambient conditions. |
Coverage status
| Recorded term | What it means |
|---|---|
COVERED | Every question this domain asks is answered by the facts listed against it. |
OPEN | Unresolved. Open means the question has not been answered, not that the part is unsafe — the reason states what is missing. |
Source availability
| Recorded term | What it means |
|---|---|
AVAILABLE | The document was retrieved and is on record. |
Source authority
| Recorded term | What it means |
|---|---|
DISTRIBUTOR_IDENTITY | A distributor listing. Establishes which part this is, nothing more. |
MANUFACTURER_PRIMARY | The manufacturer's own document for this exact part. |
Identity state
| Recorded term | What it means |
|---|---|
VERIFIED | The exact orderable part has been confirmed against a source. |
Source state
| Recorded term | What it means |
|---|---|
AVAILABLE | At least one document backing this line was retrieved. |
Unit
| Recorded term | What it means |
|---|---|
NONE | The value is not a physical quantity, so it carries no unit. Recorded as `NONE`. |
Raw agent resource
This page is generated from a stored evidence bundle and does not restate it. The bundle is the source of truth: where the two ever disagree, the bundle is right and this page is stale.
The owning bundle is not identified in the published model, so no reciprocal link can be given for this record.